Endangered Species (Customs Control) Mr. Stephen Ross asked the Chancellor of the Exchequer what instructions are issued by the Board of Her Majesty's Customs and Excise to its officers in connection with the illegal traffic in the byproducts of endangered species; and if he is satisfied that they are effective. Mr. Robert Sheldon The instructions list the species and the parts and derivatives, the importation and exportation of which are prohibited except under licence and apply the general instructions about evasion of customs controls. I have no reason to doubt their effectiveness.